Daikin VRV K - 2.28 Malfunction of Transmission Between Indoor Units

Troubleshooting Si-95
94 Troubleshooting Inverter K Series
2.18 Outdoor Unit: Abnormal Discharge Pipe Temperature
Remote Controller
Display
FF
FF
33
33
Supposed Causes ■ Abnormal discharge pipe temperature
■ Defect of discharge pipe thermistor (R3-1T, R3-2T)
■ Defect of outdoor unit PC board
■ Discharge pipe thermistor wrong connection
■ Liquid injection solenoid valve wrong connection
Troubleshooting
∗1 Refer to Thermistor Resistance / Temperature Characteristics on P138
(VF044)
Discharge pipe
temperature is 135˚C
or higher.
Is there a wrong
connection of the injection
solenoid valves Y3S
and Y4S?
Is there a
wrong connection
of the discharge pipe
thermistor?
R3-1T (inverter side) X16A
R3-2T (standard
side) X17A
Are
the characteristics
of the discharge pipe
thermistor normal?
R3-1T, R3-2T
(See ∗1)
Replace outdoor unit PC board A1P.
Connect correctly and turn on again.
Replace the discharge pipe thermistor.
NO
NO
NO
NO
Out of gas, compression defect, etc.
Defect of the refrigerant system
YES
YES
YES
YES
SI-95.BOOK Page 94 Friday, March 31, 2000 10:59 AM